smith



(No Model.) 2 Sheets-Sheet 1.

J. G. SMITH.

ADJUSTABLE GONGENTRIG GHANNELER- Patented'Sept. 15, 1885.

V Pyle ZSheets-Sheet 2.

(No Model.)

J. C. SMITH.Y

ADJUSTABLE GUNGBNTRIG CHAMBER. No. 326,342.

N. PETERS. Piwllhographa UNITED STATES PATENT OEEICE.

.'.TAMES C. SMITH, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TOTHOMASVG. NEYVGENT, OF SAME PLACE.

"ADJUSTABLE CONCENTRIC CHANNELER.

SPECFICATION forming part of Letters Patent No. 326,342, dated September15, 1885` Application tiled May 20, 1585. (No model.)

To all whom it may concern,.-

Be it known that I, J AMES C. SMITH, of Boston, (Oambridge,)in thecounty of Middlesex andState of Massachusetts, have'invented a new y anduseful Improvement in Adjustable Concentric Channelers,wh'ich will, inconnection with the accompanying drawings, be hereinafterl fullydescribed, and specifically defined in the appended claims. 1o Thisinvention has for its object the produc- A tion of a tool adapted toeither hand or power use, and by which concentric channels or grooves ofany desired depth and radius may be rapidlyformed in wood, or by whichcircular openings may be cut entirely through the body of the wood uponwhich the toolY operates, as will, in connection with the accompanyingdrawings, be hereinafter fully described, and particularly claimed.

2o In said drawings, Figure 1 is a side elevation of my improvedchanneler. Fig. 2 is an inverted or under side plan view of the same.Fig. 3 is a longitudinal vertical section taken as on line Z, Figs. 1and 2. Fig. 4 is an outside elevation of one ofthe cutters of mychanneler, taken as viewed from either the right or left in Fig. 1. Fig.5 is a reverse or inside view of the cutter shown in Fig. 4. Fig. 6 isan edge elevation of the lower portion of thev cutterholding stock,taken as viewed from the right in Fig. et and from the left in Fig. 5.Fig. 7 is an edge elevation of the cutter proper, taken as viewed fromthe left in Fig. 4 and right in Fig. 5. Fig. 8 is a sectional plan viewofone 3 5 of the cutters shown in Figs. 4 and 5, the section being online X, Fig. 4, and the View from above that line. Fig. 9 is a sectionalplan View, the section being on line NV, Fig. 1, and the view from abovethat line. Fig. 10 shows the 4o frame of my channeler as lineallygraduated for convenience of adjusting both the radius of the channel tobe cut and the depth thereof.` Fig. 11 is a view like Fig. 5, butshowing the cutter as provided with a gage thereto secured.

4 5 Fig. 12 is a detached side elevation of the gage shown in Fig. 11,and viewed as from the left therein. Fig. 13 is an inverted or underside plan view of Fig. 11.

In said views, A represents theframe or body 5o of my channeler, thesame being formed with a stem, a, adapted to be secured in a bit-brace,arbor, or chuck, by which to rotate it, and having a bar, b, whose axisis perpendicular to that of stem a. A hole is formed in bar b axial tostem a to receive the boring-tool c, by which the channeler is heldinproper position when operative. -A set-collar, d, is arranged on stem a,it being locked vby a pinchscrew, f, and held from rotation by gibe,which enters corresponding slots cut in the collar and 6o stem. Agage, B, is secured to stem a by hub g, which is provided with aset-screw, j, and is interlocked with said stem by a gib, e', insertedin a slot correspondingly cut in said hub and stem, as shown in Figs. 2and 3. From said 65 hub g depend arms i, which terminate in feet h. Acoiled arm-spring, k, secured by a set-screw .to one end of bar b, hasits arms respectively seated upon ears Z of the gage, and thus tendsconstantly to depress the same, as shown in 7o Figs. l and 3. Upon bar bare arranged the cutter heads or stocks m m, each locked in position,when adjusted, by a pinch-screw, n, and each interlocked with bar b by agib, e, as shown in Figs. 1, 2, 4, 5. Upon each stockm is secured thecutter p by screws Q, which pass through slots in the cutter and arethreaded in the stock, as shown in Fig. 5, thereby rendering the cutterlincally adjustable upon the stock to vary the rankrness of its cut. Atthe 8o lower end of stocks m is formed a recess or throat, o, leaving 'alower or end face, w, while a corresponding throat,u,is formed in thelower portion of cutterp,which terminates in the cutting knife-like edges, upon the upper face of 8: which, next the outer line, is the spur t,arv ranged to cut an outer peripheral path in the same manner as do thespurs upon angers and auger-bits.

rlhe slight extension of cutting-edges of cut- 9o ter p below the endface, w, of stock m determines the thickness of chip cut by p, and theopening between s and m is, as shown in Figs. 2, 8, oblique to the axisof bar b, in order that the inner part, rv, Fig. 8, of cutting-edges mayslightly precede spurt, as thereby a more perfeet path or groove isformed in the wood than if the line of edge s coincided with a lineradial from the axis of stem a.

In practice stocks m are secured on bar b at 10o an equal distance fromthe axis of a, (which is readily done when the bar is graduated as shownin Fig. 10,)and at such distance therefrom that the circular path cut bycutters p shall be of the requisite diameter, and if, instead of cuttingentirely away the portion of Wood thus circumscribed it is desired tocut a channel of a. certain depth, the gage B is either retracted therequisite distance and locked by its setscrew j, or else the gage-collard is locked in the proper position to arrest the hub g of the gage B,when it is forced back by the sinking of cutters p in the wood that isbeing channeled.

In some classes of work it is better to lock gage B in the desiredposition,while in others the spring-enforced pressure of the gage uponthe wood being cut is advantageous, in which event the depth of thechannel is controlled by the position of gage-collar d; and when cuttingentirely throughthe wood gage-collar dis retracted,so as not tointerfere with the action of the cutters, while gage B may be left tothe action of its spring, or it may be suiciently retracted an'd lockedupon stem a.

Instead of having bar b extend from bothl sides of stem a it may extendfrom one side only,

gage, y, secured to stock m by a set-screw, z, as shown in Fig. 1l, thelower end of the gage being interlocked with the stock, as shownin Figs.11, 13, and by its slot being lineally adjustable to allow any desireddepth of channel t0 be cut. By interlocking stocks m with bar v in whichcase the cutter thereon may,`in steadof gage B, be provided with aslotted b by means of gibs e said stocks are held in the same plane asboring-tool c.

I am aware that tools having blade-like cutters adapted to cut disksfrom leather by merely penetrating the same have been heretofore used;hence I make no claim to such a tool, which would separate leather, butcould not cut a channel in wood, While my cutters will channel wood, butcould not be used for separating leather.

I claim as my inventionl. The combination, with a concentric channeler,of a spring-advanced gage constructed and arranged tobe adjusted andlocked at will to control the penetration of the channelforming cutters,substantially asspecitied.

2. rBhe combination, in a .concentric channeler, of adjustableset-collarld, and the sliding spring-advanced gage`B,"substantially asspecified. t p

3. The channel-forming' cutters consisting Iof stock m, formed to besecured upon bar' b,

andhaving throat fv, and face w, and cutter p.

'adjstably secured to said stock and formed with throat u, cutting-edges, and spurt, all substantiallyas specified.

47.4. In aA concentric channeler, the combination, with sliding gage B,-of arm-spring I,`r 'se cured on bar b, and connected with and arrangedto depress said gage, substantially as specified.

- JAMES C. SMI'III.

Witnesses:

T..W. PORTER, y l EUGENE HUMPHREY.

